Jar-closure.



E' No. 769,600.

' UNITED To a/ZZ wwwb it may concern: Be it known thatI,WILLIAM B. FENN,a citizen of the United States, residing at Tashingto`n, in the countyof Washington and State of Pennsylvania, have invented a certain new anduseful J ar-Closure, of which the following is a specieation.

My invention relates particularly to means for closing glass bottles,fruit jars and the like, and for effectually sealing the same, and theprovision of a glass closure cap easily `removable vfrom and attachableto the jar. The principal objects of the invention are, to provide aclosure in .which the contents of the jar are not brought in contactwith any metal or any packing which is pervious or may be attacked byacids, cc. and to provide simple and cheap means for attaching the jarcap in such f a manner as to create considerable pressure on thepackingand to avoid any Contact between the cap and glass of the jar.These objects and other advantages which will hereinafter appear, Iattain by means of the construction illustrated in preferred form in theaccompafnying drawings, wherein Figure 1 is a half side elevation andhalf Y vertical central section of the cap of the jar; Y. Figure 2 is asimilar view of the jar neck,

l showing the attaching means thereon;

Figure '3 is a plan view of the removable spring thread which I use.

Figure 4 is the same, shown in place on the jar neck, with asection ofthe latter along the .line of the thread groove; and

Figure 5 is apartial vertical central section, enlarged, showing the capin place on the jar, and the position of the packing and the screwthread.

. For the purpose of withstanding acids, dsc., Iuse in this jar closurea packing composed of some kind of liber such as cotton lint, and a waxsuch as parafline, and place the same in a groove within the cap of thejar so as to rest upon the top edge of the jar neck. In order Y toprovide for means of attaching the cap .on Y j the jar I make use of aspring ring which is zzgsprung into place in a spiral groove in the neckof the jar and engages a similar groove in the cap of the jar, the ringbeing the only 'iff u: fri weiem-ieee s STATES Vward on the neck of thejar.

Patented September 6, 1904.

PATENT OEEICE.

IVILLIAM B. FENN, OF WASHINGTON, PENNSYLVANIA.

JAR-CLOSU RE.

SPECIFICATION forming part of Letters Patent No. 769,600, datedSeptember 6, 1904.

Application led September 16, 1903. Serial No. 173,420. (No model.)

thing except the packing which comes in contact with the cap in theclosure.

In the accompanying drawing, the neck of the jar a is shown as madewitha taper form, j. that is, slightly conical, and is provided with thecircumferential spiral groove b arranged in the form of a female screwthread, and in this groove b I place a wire ring '@which is madenormally of less diameter thanthe jar neck, as shown in Figure 3, andprovided withslightly downturned ends o', which be- 6o i ing sprung overthe jar neck snaps into the groove I) therein, the ends of the groove inthe neck being sunk below the general contour of the neck so that theends of the wire do not project to catch onanything,l and the wire ringforming a taper thread progressvely of greater diameter as it proceedsdown- The cap d is provided with a similar screw thread groove e toengage the wire c, and at the top is provided with an annular retaininggroove in which the packing f, composed ofvljntaand some form ofimpervious wagrmis seatedLA From Figure 5 it will be apparent-dt-thescrewing of the cap on the ring c will compress the packing f in itsplace and that the cap is not in contact with any glass portion of thejar but only with the packing and the ring c; and it will be evidentthat because of the sloping form of both the cap and the neck, the capis easily placed in position and provides a very secure and powerfulfastening and heavy pressure upon the packing f. Y

rIhe ring o may conveniently be made of spring steel wire and thepacking ring f may 8 5 be provided by stamping out of sheets of thematerial. rIhis provides a closure in which only a small portion of thepacking is in con tact with the contents ofthe jar and this composed ofa packing which is not attacked by 9`O acids and is totally imperviousto anything that may be put in the bottle. The placing of the ring cloosely in the groove of the jar neck allows of considerable elasticityin the action of the same, whereby the pressure may be brought upon thetwo grooves respectively in the cap and the neck, and it may adjustitself and maymove the resilient thread to some slight extent so as toaccommodate both glass surfaces and make aperfectly tight and elasticjoint. Other advantages of the device will readily occur to thosefamiliarwith the art.

Having thus described my invention and 1 illustrated its use, whatIclaim as new, and desire to secureby Letters Patent,v is the following:

1. In a jar closure the combination of the neck and a cap each havingfemale threads, a wire coil co-operating with said threads and forming amale thread, a packing between the neck and cap placed on the top of theneck, and the neck and cap both being of conical form, whereby thethread is differential in diameter, substantially as described.

2. The combination with a jar neck having means to retain a wire thread,of a wire thread secured thereon, a cap having female threads toco-operate with said wire thread, and an impervious packing secured inthe cap to rest on top of lthe` jar neck` whereby the wire thread isprotected from the contents of the jar.

A 3. The combination with a jar neck and a cap having conical surfaces,and a removable wire thread engaging the neck and cap, and a channel inthe cap containing a packing composed of impervious material securedtherein and adapted to rest upon the top of the neck so as to expose tothe contents of the, jar only a small strip of said impervious packing.

4. In a jar closure a neck and cap made of conical form and providedwith femalethreads, and a removable wire forming a male threadtherebetween, and having its ends depressed in the thread channel of theneck, to avoid contact with the cap, and a packing between the neck andcap, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of thetwo subscribing witnesses.

WILLIAM B. FENN.

Witnesses:

MARGARET C. KEEBLE, CHAs. H. EBERT.

